Knife-polishing machine.



E. TEBEAU.

KNIFE POLISHING MACHINE.

, APPLICATION FILED MAR-2. I914.

1,147,828. Patented July 27, 1915.

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nanns'r TEBEAU, or STOCKTON, CALIFORNIA.

KNIFE-POLISHING MACHINE.

To all whom it may concern:

Be it known that l Eanns'r TEBEAU, a

citizen of the United States, residing at Stockton, county of San Joaquin, and State of California, have invented certain newand useful Improvements in Knife-Polishing Machines, of which the following is a specification. l This invention is a knifepolishing machine, and the primary object of the invention is to provide adeviceof the class described which is extremely simple in construction, economical to manufacture, yet highly eflicient in its operation.

The invention embodies a machine wherein a pair of cooperating polishing members are provided; one fixedly mounted for simple rotation, and the other mounted for r0- tation, but adapted for movement toward or away from the former.

A salient featu-reof the invention resides in means operablej by the article being polished, for impelling the movable polishing member toward,or away from the stationary member.

In one of it's-practical forms the invention embodies a frame in which is mounted'a polishing disk, adapted for rotationbut retained against movement relative to said frame; a second polishing disk mounted in said frame for rotation, but adapted for movement toward or away from the first unentioneddisk; a lever pivoted to the frame, cooperating with the movable disk, and having the power arm of said lever so positioned as tolbe engaged by the knife during theprocess of polishing the same,

whereby the operation of polishing the knife automatically causes the cooperating disks to engage the blade of the knife under the required pressure; and means for simultaneously rotating said disks. Means for securing ,the frame to a rigid support is also preferably provided.

Features of the invention, other than those specified, will be apparent from the following description, read in conjunction with the accompanying drawings.

a the accompanying drawing I have illustrated one practical embodiment of the invention, but the construction shown therein is to be understood as illustrative, only, and not as defining the limits of the invention.

Specification of Letters Patent.

Patented July 27, 1915.

Application filed Marehfi, 1914. Serial No. 821,868.

Figure l is a side elevation of a knife polishing machine embodying the'present invention. Fig. 2 is a vertical, transverse sec tion thereof, taken on' line 2-2 of Fig. 1. Fig. 3 is a plan view illustrating a bifurcatedbell-crank lever which I preferably employ.

Referring to the drawings, A designates a frame formed with a pair of upstanding pacedarms a, a, and preferably provided witha depending portion a projected inwardly as at a and threaded to receive a "thumb screw B for the purpose of providshaft, mounted for rotation in the bearing 0,

but fixed against longitudinal movement by means of the collar 0, exteriorof the frame, and a pmion E. interior-1y thereof, both of said members being rigidly secured to said shaft.

The spindle D, which cooperates with the bearing a, is provided interiorly of the frame with a broad-faced pinion F, but is of such length as to protrude for some dis .tance beyond. the exterior of said frame.

The spindle D is thus adapted for movement longitudinally of its axis, but is provided at its outer extremity with a shoulder d. Intermediate the shoulder d and the exterior of the frame A, and arranged co- .ax-ially with the shaft D,- is a spring Gr adapted to normally retain said shaft in its exteriorly extended position.

On the adjacent ends of each of the spindles C and D, are fixed face plates H, to

which are. secured, in any suitable manner, resilient members, 7i, each provided with a suitable facmg ha These facmgs are shown as leather disks, the centers of which are cut out as at If. The disks h" are adhesively secured to the-resilient members 72,, and em body the faces which operate the knife blade during the polishing operation.

Mounted against longitudinal movement in the frame A, below the spindles C and D,

iismashaft I. This shaft, which is journaled in the bearings i and z", in the arms a and a,

respectively, is provided with suitable means for imparting rotation thereto, preferably a crank L, and on said shaft is fixed a pair of gears J and K which mesh with the pinions E and F on the spindles C and D, respec tively. Thus, when the crank L is turned, the power generated is transmitted through the shaft I and gears J and K to the pinions E and I for the purpose of rotating the spindles C and D, whereby the polishing disks h are rotated in the same di rection.

As hereinbefore stated, the spindle D is adapted for longitudinal movement, hence the broad faced pinion F which assures operative connection between the shafts I and D at all times irrespective of the position of the shaft D.

In order that the shaft D may be shifted so that the polishing surfaces of the disks h will engage with the faces of the knife blade in carrying out the operation of polishing the same, I provide means whereby the PlilQ';

ing of the knife in proper position automatically' ad usts the splndle D to its correct operative position. This means is embodied in a bell-crank lever O which is pivoted at M to a projecting finger N'of the frame A. The lever O is so placed that its work arm 0 extends upwardly past the outer end of the spindle D, while its power arm 0' is bifurcated, and is thus adapted to straddle the working elements of the machine so as to extend across the opening between the polishing disks. A thumb-screw P is threaded through the work arm 0, and engages the end of the spindle D, whereby proper adjustment may be had.

The operation of the partsthus far described will be apparent, it being manifest that when the knife is positioned between the polishing disks h in such manner that the back of the knife blade engages with the upper edge of the power arms 0 of the lever O, a downward pressure upon said knife blade will tiltthe bell crank on its point of pivoting M. This causes the work arm 0 to engage thelend of the shaft D with a result that said shaft is shifted against the tension of the spring G, to bring the movable polishing member into engagement with the face of the knife blade. For the purpose of allowing the knife blade to be readily positioned between the polishing disks, the free ends of the arms a and a of the frame, are preferably extended inwardly over the polishing members, and shaped to form a wedge shaped entrance for the knife blade, whereby incorrect positioning of the knife is rendered impossible. If the crank L is now turned, the rotary motion will be imparted through the shafts I, gears J, K, and pinions E and F to the polishing disks 72,. with the result that the knife positioned between said disks is polished. It will be clear that the greater downward pressure exerted by the operator upon the knife blade, the greater will be the such waste upon the table or other support to which the machine is attached. The receptacle referred to is shown inthe form of a drawer Q, which is mounted to slide in the ways 9, formed in the frame Aso that said drawer is easily detachable for removing the accumulated waste from the polishing disks. Having thus fully described the invention, what I claim as new, and desire to secure by Letters Patent is i 1. In a knife polishing machine, the combination of a frame, a polishing member mounted for rotation'thereon, a second pol ishing member rotatably mounted on the frame and adapted for movementtoward and away from the first mentioned polishing member, means for rotating said polishing members in synchronism, and means whereby the placement of the article to be polished in proper position imparts movement to the movable polishing member to bring said member into operative relation to its complementary polishing member, said means operating to move the movable polishing member independently of the means for rotating the polishing members.

2. In a knife polishing machine, the conibination of a pair of rotatable polishing members one of which is movable toward or away from the other, means for rotating said members, means'for normally retaining the movable member in retracted position,

and means operable by the placement of a knife between the polishing membersfor automatically impelling the movable mem- "ber toward its complementary polishing member, said impelling means being entirely independent of the means for rotating the polishing members, in the carrying out of its function.

3. In a knife polishing machine, the combination of a frame, a pair of alined shafts mounted thereon one of said shafts being stationary and the other movable longitudinally toward and away from the stationary shaft, means for simultaneously rotating said shafts, polishing members mounted on the adjacent ends of the shafts and adapted to operate on a knife blade passed therebe tween, means for normally retaining the movable shaft in retracted position, and means operating directly upon the movable shaft and extending across the opening between the polishing members, whereby the positioning of a knife between the polishing members operates said last mentioned means for the purpose of impelling the movable shaft toward the stationary shaft.

4. In a knife polishing machine, the combination of a frame, a pair of alined shafts mounted thereon one of said shafts being stationary and the other movable longitudinally toward and away from the stationary shaft, means forsimultaneously rotating said shafts, polishing members mounted on the adjacent ends of the shafts and adapted to operate on a knife blade passed there between, means for normally retaining the movable shaft in retracted position, and a lever pivoted to the frame in such manner as to extend across the opening intermediate the two polishing members, said lever being adapted to cooperate with the movable shaft, whereby a knife blade positioned between the polishing member engages with the lever with the result that the movable polishing member is impelled toward its cooperating stationary member, said movement of the movable polishing member being accomplished by the lever independently of the means for rotating the polishing members.

5. In a knife polishing machine, the combination of a frame, a pair of coiiperating polishing members mounted thereon, one of which is stationary, and the other movable toward and away from the stationary member, means for rotating said members, and a bell-crank pivoted to the frame in such manner that the power arm of said bellcrank extends across the opening intermediate the polishing members and its work arm engages with the movable shaft, whereby the positioning of a knife between the polishing members operates the bell-crank to impel the movable polishing member toward the stationary member.

6. In a knife polishing machine, the combination of a supporting frame, a pair of shafts mounted thereon, one of which is stationary and the other movable toward and away from the stationary shaft, means for retaining the movable shaft in retracted position, cooperating polishing members mounted on the adjacent ends of said shafts, means for imparting rotation to said shafts, and a bell-crank lever, the work arm of which is adapted to engage the end of the movable shaft and the power arm of which is bifurcated, whereby it is adapted to straddle the operating parts of the machine so as to extend across the opening between the polishing members with the result that the positioning of a knife between the polishing members operates the bell-crank to impel the polishing member on the movable shaft toward its cooperating member on the stationary shaft.

7. In a knife polishing machine, the combination of a supporting frame, a pair of alined'spindles mounted on said frame, one stationary and the other movable toward and away from the stationary spindle, polishing disks mounted on the adjacent ends of said spindles, a spring cooperating with the movable spindle for normally retaining said spindle in retracted position, pinions mounted on both the stationary and movable spindles, a driving shaft, means for ro tating said shaft, gears fixed on the driving shaft and meshing with the pinions on the spindles for the purpose of rotating said spindles in synchronism, spindle shifting means mounted on the supporting frame and cooperating with the movable spindle, said spindle shifting means being operable upon the insertion of a knife blade between the polishing disks to impel the movable disk toward the stationary disk, independently of the polishing disk operating means.

8. In a knife polishing machine, the combination of a supporting frame, a pair of alined spindles mounted on said frame, one stationary and the other movable toward and away from the stationary spindle, polishing disks mounted on the adjacent ends of said spindles, a spring cooperating with the movable spindle for normally retaining said spindle in retracted position, pinions mounted on both the stationary and movable spindles, a driving shaft, means for rotating said shaft, gears fixed on the driving shaft and meshing with the pinions on the spindles for the purpose of rotating said spindles in synchronism, the pinion on the movable spindle having a wide face, whereby said wide faced pinion is constantly in mesh with its cooperating gear, irrespective of the position of the movable spindle, and means, independently of the disk operating means in the carrying out of its function, for imparting longitudinal movement to said movable spindle.

9. In a knife polishing machine, the combination of a frame, a polishing member mounted for rotation thereon, a second polishing member ro-tatably mounted on the frame, and adapted for movement toward and away from the first mentioned polishing member, means for rotating said polishing members in synchronism, and a lever as sociated with the movable polishing mem her, and adapted to be directly engaged by the article to be polished, whereby the place ment of said article in proper position imparts movement to the movable polishing member, said lever operating to move the movable polishing member independently of the means for rotating the polishing members.

10. In a knife polishing machine, the combination of a pair of rotatable polishing members, one of which is movable toward or away from the other, means for rotating said members, means for normally retaining the movable member in retracted position, and a lever associated with the movable polishing member, and operable directly by a knife placed between the polishing members for automatically impelling the movable member toward its complementary member, said lever being entirely independent of the means for rotating the polishing members, 10 in the carrying out of its function.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ERNEST TEBEAU.

Witnesses:

J. F. AIRY, JAMES T. OPELHA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. a 

